Benchmark: int to string convertation

Tests:

String
const arr = Array(1000).map(() => ~~(Math.random() * 1000)) const b = arr.map((num) => String(num))
toString(10)
const arr = Array(1000).map(() => ~~(Math.random() * 1000)) const b = arr.map((num) => num.toString(10))
toString
const arr = Array(1000).map(() => ~~(Math.random() * 1000)) const b = arr.map((num) => num.toString())
interpolation
const arr = Array(1000).map(() => ~~(Math.random() * 1000)) const b = arr.map((num) => `${num}`)
plus
const arr = Array(1000).map(() => ~~(Math.random() * 1000)) const b = arr.map((num) => '' + num)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String
toString(10)
toString
interpolation
plus

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser/OS: Firefox 135 on Ubuntu

View result in a separate tab

Test name	Executions per second
String	131526.0 Ops/sec
toString(10)	132893.3 Ops/sec
toString	135607.5 Ops/sec
interpolation	145555.4 Ops/sec
plus	133422.9 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition**

The benchmark definition json represents a simple JavaScript code snippet that creates an array of 1000 random integers between 0 and 1000, maps each integer to its string representation using different methods (e.g., `toString()`, `toString(10)`, interpolation with template literals `${num}`, and concatenation with the `+` operator), and stores the results in a new array.

**Options Compared**

The benchmark compares four different approaches to convert integers to strings:

1. **String**: Uses the `String()` function.
2. **toString()**: Uses the `toString()` method on the number object (e.g., `num.toString()`).
3. **toString(10)**: Uses the `toString(10)` method on the number object with a radix of 10.
4. **interpolation**: Uses template literals `${num}` to convert the integer to a string.
5. **plus**: Uses the `+` operator to concatenate the integer with an empty string.

**Pros and Cons**

Here's a brief overview of each approach:

1. **String()**: Simple and widely supported, but might be slower due to the overhead of calling a function.
2. **toString()**: Fast and efficient, as it's a native method on the number object. However, it might not work correctly for negative numbers or non-integer values.
3. **toString(10)**: Similar to `toString()`, but with a radix of 10, which can affect the output format. This approach is specific to JavaScript and might not be widely supported elsewhere.
4. **interpolation**: Fast and efficient, as it uses template literals, which are optimized for string interpolation. However, it requires modern JavaScript features (ES6+).
5. **plus**: Simple and fast, but may lead to performance issues with large numbers due to the overhead of concatenation.

**Library Usage**

None of the benchmark test cases use external libraries.

**Special JS Features or Syntax**

The `interpolation` approach uses template literals, which is a modern JavaScript feature introduced in ES6. This means that the benchmark results might not be compatible with older browsers or environments that don't support this syntax.

**Other Alternatives**

If you're looking for alternative approaches to convert integers to strings, you could consider:

1. **parseInt()` and `concat()`: Use `parseInt(num)` followed by concatenation with an empty string using the `+` operator.
2. **Number()` and `toString()`: Convert the integer to a number using `Number(num)` and then call `toString()` on it.
3. **Buffer.toString()`: In Node.js environments, you can use the `Buffer` class's `toString()` method to convert integers to strings.

Keep in mind that these alternatives might have varying degrees of performance, compatibility, and readability depending on your specific use case.

Related benchmarks:

int to string convertation (version: 0)

Comparing performance of: String vs toString(10) vs toString vs interpolation vs plus

Created: one year ago by: Guest

Jump to the latest result

String

toString(10)

toString

interpolation

plus

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):